Water pump starting device, quick-start water pump and water pump starting method

Abstract

The invention discloses a water pump starting device, a quick-start water pump and a water pump starting method.The water pump starting device comprises a side valve body, a side valve clack, a guide rod, a spring, a bayonet lock, a fluid passing body, a main valve clack and a pin shaft, the side valve clack is connected with the guide rod and can be in sealing fit with the side valve body under the action of the spring, and the side valve clack is connected with the guide rod; the guide rod is in sliding fit with the side valve body and the fluid passing body, the bayonet lock is matched with a guide hole in the guide rod to limit or release the main valve clack, the main valve clack is rotationally connected with the fluid passing body through a pin shaft and is in linkage with the side valve clack under the action of water supply pressure, and therefore water path switching in the pump starting process is completed. The device is compact in structure and easy and convenient to operate, automation can be achieved, the starting time is effectively shortened, cavitation is prevented, the operation efficiency and reliability are improved, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water pumps, in particular to a water pump starting device, a water pump starting method and a water pump. BACKGROUND

[0002] As an important equipment of water supply and drainage system, water pumps are widely used in residential life, industrial production and municipal facilities. The total installed capacity of water pumps in China exceeds 10 million units, of which more than 90% are liquid above centrifugal pumps. At present, the liquid above centrifugal pump generally adopts the vacuum water starting mode and the water filling starting mode. However, the vacuum water starting mode requires a vacuum device and a complex pipeline, an electric control system and a detection system. Its disadvantages are long starting time, large noise, complex system, high failure rate; if there is shaft seal or pipeline air leakage, it may need to be started again, which seriously affects the operation reliability. The water filling starting mode needs to install a bottom valve at the water suction port. The bottom valve not only increases the water suction resistance and reduces the water suction efficiency, but also limits the water suction height of the centrifugal pump, which is easy to cause cavitation, affecting the service life and stability of the pump.

[0003] Both of the above two methods have the problems of complicated operation and low efficiency. Therefore, how to provide a water pump starting device, a water pump starting method and a water pump starting method with simple operation and high efficiency have become problems to be solved in the prior art. SUMMARY

[0004] One of the technical problems to be solved by the embodiments of the present application is to provide a water pump starting device, a water pump starting method and a water pump starting method with simple operation and high efficiency.

[0005] In order to cope with the above scenarios, in a first aspect, the embodiments of the present application provide a water pump starting device, comprising: a side valve body 403, a side valve flap 402, a guide rod 4021, a spring 404, a pin 405, a flow body 406, a main valve flap 407 and a pin shaft 408;

[0006] The side valve flap 402 is connected with the guide rod 4021 and can be sealingly matched with the side valve body 403 under the action of the spring 404;

[0007] The guide rod 4021 is slidingly matched with the side valve body 403 and the flow body 406, the pin 405 is slidingly matched with the pin guide hole 4024 provided on the guide rod 4021, the main valve flap 407 is provided with a clamping groove 4071 matched with the pin 405, and the pin 405 limits or releases the clamping groove 4071 of the main valve flap 407 when the guide rod reciprocates in the axial direction;

[0008] The main valve flap 407 is rotationally connected with the flow body 406 through the pin shaft 408, so as to be linked with the side valve flap 402 to open or close under the action of water supply pressure, for realizing water path switching in the pump starting process.

[0009] In conjunction with the first aspect, in some embodiments, the following are included: the side valve disc 402 is provided with a guide rod 4021 and a locking pin guide hole 4024; a guide key 401 is installed on the guide rod 4021; a locking pin 405 is installed in the locking pin guide hole 4024 and is installed together with the spring 404 in the side valve body 403; the side valve body 403 includes a guide hole 4031, a side valve body sealing surface 4033, a first flange 4032, and a second flange 4035; the second flange 4035 of the side valve body 403 is connected to the inlet flange 4064 of the fluid 406; the fluid 406 also includes a fluid pin hole 4061, a guide hole 4062, and a bottom annular sealing surface 4066; the main valve disc 407 is provided with a groove 4071, a main valve disc sealing surface 4073, and a main valve disc pin hole 4074. Installed in the fluid 406 via pin 408, its groove 4071 engages with the pin 405. When the water pump is started to supply water, the side valve disc 402 slides to the right along the side valve body 403 and the side valve body positioning hole 4031 and guide hole 4062 of the fluid 406 under the action of water pressure, driving the main valve disc 407 to rotate around the pin 408. After reaching a certain angle, the pin 405 disengages from the main valve disc 407, and the sealing surface 4073 of the main valve disc seals with the bottom annular sealing surface 4066 of the fluid 406. The upper suction pipe and centrifugal pump are filled with water. After the centrifugal pump is started, the water flow pushes the main valve disc 407 open, the pin 405 falls into the groove 4071 of the main valve disc 407, the water pump is turned off, the spring 404 resets the side valve disc 402 and closes it, and the main valve disc 407 is fully opened.

[0010] In conjunction with the first aspect, in some embodiments, the following are included: the side valve body 403 is horizontally placed and has a straight inner cavity, the diameter of the left inner cavity of the side valve body 403 is smaller than the diameter of the right inner cavity; the side valve disc 402 includes a valve disc 4023 fixedly connected to the guide rod 4021, the diameter of the valve disc 4023 matches the diameter of the left inner cavity of the side valve body 403, the valve disc 4023 is provided with a side valve disc annular sealing surface 4022 that matches the side valve body annular sealing surface 4033; the side valve body annular sealing surface 4033 and the side valve disc annular sealing surface 4022 are in surface contact or line-surface contact structure, forming a self-resetting seal under the preload of the spring 404;

[0011] Spring 404 is connected to side valve disc 402 to make the annular sealing surface 4022 of the side valve disc fit and seal with the annular sealing surface 4033 of the side valve body in the state of depressurization or closure; when there is inlet water pressure, the side valve disc 402 is pushed to the right to release the main valve disc 407.

[0012] In conjunction with the first aspect, some implementations include:

[0013] The fluid 406 is configured to be installed vertically so that the main valve disc 407 can fall and close by gravity; both ends are flange structures connected to the suction pipe of the centrifugal pump, and a bottom annular sealing surface 4066 that cooperates with the main valve disc 407 is provided at the bottom inside; an inlet 4063 and an inlet flange 4064 that communicate with the side valve body are provided on the side near the side valve body.

[0014] The side valve body positioning hole 4031 and the fluid positioning hole 4062 are located on the same horizontal plane and are coaxial with each other, and form a sliding fit structure with the guide rod 4021 with double guide holes, which is used to constrain the axial linear movement of the guide rod 4021.

[0015] In conjunction with the first aspect, some implementations include:

[0016] The main valve disc 407 is provided with a main valve disc sealing surface 4073 that mates with the bottom annular sealing surface 4066 and a main valve disc pin hole 4074 for rotatable installation.

[0017] In conjunction with the first aspect, some implementations include:

[0018] The pin 408 passes through the fluid pin hole 4061 and the main valve disc pin hole 4074, so that the main valve disc 407 can be opened and closed relative to the fluid 406.

[0019] In conjunction with the first aspect, some implementations include:

[0020] One end of the guide rod 4021 is slidably engaged with the side valve body positioning hole 4031, and the other end is slidably engaged with the fluid flow positioning hole 4062, so that under the action of the water supply pressure of the water pump, the side valve disc 402 is opened and, together with the locking pin 405, the main valve disc 407 is linked for control.

[0021] In conjunction with the first aspect, some implementations include:

[0022] A guide key 401 is disposed inside the side valve body 403 and is used to cooperate with the side valve disc 402 or the guide rod 4021 to limit the attitude and stroke of the side valve disc and prevent swaying.

[0023] In conjunction with the first aspect, some implementations include:

[0024] The side valve body 403 is installed horizontally, and the side valve body positioning hole 4031 is fixed to the side valve body body 4034 of the side valve body 403 by a connecting rib plate.

[0025] In conjunction with the first aspect, some implementations include:

[0026] The bottom annular sealing surface 4066 inside the fluid 406 is arranged facing the main valve disc sealing surface 4073, and the main valve disc 407 is opened or closed by rotating around the horizontal axis through the pin 408.

[0027] In conjunction with the first aspect, some implementations include:

[0028] The fluid 406 has an inlet 4063 and an inlet flange 4064 on the side near the side valve body 403, which are used to connect and communicate with the second flange 4035 of the side valve body 403.

[0029] In conjunction with the first aspect, some implementations include:

[0030] The side valve body 403 and the first flange 4032 are used for detachable connection with the outlet flange of the water pump.

[0031] In conjunction with the first aspect, some implementations include:

[0032] The fluid passage 406 is provided with a horizontal fluid passage pin hole 4061, and the pin shaft 408 passes through the fluid passage pin hole 4061 and the main valve disc pin hole 4074, so that the main valve disc 407 swings and switches between the open state and the closed state.

[0033] Secondly, embodiments of this application provide a fast-start water pump, comprising:

[0034] The submersible water pump 2 includes, as described above, a water pump starting device 4, an upper suction pipe 3, a lower suction pipe 6, a centrifugal pump 5, and a filter screen 7; wherein, the outlet of the submersible water pump 2 is connected to the first flange 4032 of the inlet of the water pump starting device 4, the third flange 4065 of the outlet of the water pump starting device 4 is connected to the upper suction pipe 3, the fourth flange 4067 is connected to the lower suction pipe 6, and the upper suction pipe 3 is connected to the inlet of the centrifugal pump 5.

[0035] In conjunction with the second aspect, some implementation methods include:

[0036] The submersible water pump includes a submersible impeller, a motor mounted on the ground, and a pump shaft and an outer pipe connecting the impeller and the motor.

[0037] In conjunction with the second aspect, some implementation methods include:

[0038] The lower suction pipe 6 is equipped with a filter screen 7, which is used to filter impurities entering the pump body.

[0039] Thirdly, embodiments of this application provide a method for starting a water pump quickly, applicable to water pumps equipped with a water pump starting device, comprising:

[0040] Start the submersible water pump 2 to supply water to the water pump starting device 4. The side valve 402 of the water pump starting device 4 moves to the right to open and lowers the main valve 407 to close it. The centrifugal pump 5 and the upper suction pipe 3 are supplied with water and the air is purged.

[0041] Once centrifugal pump 5 meets the start-up conditions, start centrifugal pump 5;

[0042] After the centrifugal pump 5 is running stably, the main valve disc 407 opens automatically, and the retaining pin 405 enters the main valve disc retaining groove 4071.

[0043] When the submersible water pump 2 is turned off, the side valve 402 closes under the action of the spring 404.

[0044] With the main valve 407 fully open, centrifugal pump 5 enters normal operation.

[0045] The pump starting device, rapid-start pump, and starting method proposed in this invention can effectively overcome the defects of traditional vacuum or water-filling methods, such as long starting time, complex structure, easy air leakage, low efficiency, and easy cavitation. By setting up a structure in which the side valve body, side valve disc, main valve disc, guide rod, locking pin, spring, and fluid flow work together, automatic water circuit switching under the water supply pressure of the submersible feed pump is realized: During the start-up phase, the side valve disc opens and links with the main valve disc to form a seal, ensuring that the water flow directly enters the centrifugal pump, quickly venting air and shortening the pre-supply time; after the centrifugal pump reaches the start-up conditions, it automatically starts to run, and the main valve disc reliably opens and locks under the action of water flow and locking pin, eliminating water suction resistance and ensuring the efficient operation of the main pump; subsequently, the submersible feed pump is shut down, and the side valve disc resets and seals under the action of spring preload, preventing backflow and ensuring safe and stable system switching. This solution is not only compact and easy to assemble, but also features automatic reset and self-sealing functions. It can also reduce energy consumption and failure rate, improve the automation and reliability of pump startup, achieve a fast, stable and safe startup process, and significantly extend the service life of the equipment. It has good value for promotion and application.

[0046] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0047] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0048] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0049] Figure 1 This diagram shows a cross-sectional view of a water pump starting device according to an embodiment of the present invention.

[0050] Figure 2This is an enlarged cross-sectional view of the side valve disc structure of a water pump starting device according to an embodiment of the present invention;

[0051] Figure 3 This is an enlarged cross-sectional view of the side valve body of a water pump starting device according to an embodiment of the present invention;

[0052] Figure 4 This figure shows an enlarged cross-sectional view of the fluid flow structure of a water pump starting device according to an embodiment of the present invention;

[0053] Figure 5 This figure shows an enlarged cross-sectional view of the main valve disc structure of a water pump starting device according to an embodiment of the present invention;

[0054] Figure 6 This figure shows a front view of the main valve disc of a water pump starting device according to an embodiment of the present invention;

[0055] Figure 7 A structural diagram of a fast-start water pump according to an embodiment of the present invention is shown. Detailed Implementation

[0056] The present application will be further described below with reference to specific embodiments and accompanying drawings. It is understood that the illustrative embodiments of this disclosure include, but are not limited to, related methods, devices, and systems. The specific embodiments described herein are merely for explaining the present application and not for limiting it. Furthermore, for ease of description, the accompanying drawings show only the parts relevant to the present application, and not all of the structures or processes.

[0057] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application will be presented in conjunction with preferred embodiments, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0058] Figure 1 This diagram shows a cross-sectional view of a water pump starting device according to an embodiment of the present invention. Figure 2 This is an enlarged cross-sectional view of the side valve disc structure of a water pump starting device according to an embodiment of the present invention; Figure 3 This is an enlarged cross-sectional view of the side valve body of a water pump starting device according to an embodiment of the present invention; Figure 4This figure shows an enlarged cross-sectional view of the fluid flow structure of a water pump starting device according to an embodiment of the present invention; Figure 5 This figure shows an enlarged cross-sectional view of the main valve disc structure of a water pump starting device according to an embodiment of the present invention; Figure 6 This figure shows a front view of the main valve disc of a water pump starting device according to an embodiment of the present invention; Figure 7 A structural diagram of a fast-start water pump according to an embodiment of the present invention is shown. Figures 1-7 The pump starting device includes: a side valve body 403, a side valve disc 402, a guide rod 4021, a spring 404, a locking pin 405, a flow path 406, a main valve disc 407, and a pin 408. The side valve disc 402 is connected to the guide rod 4021 and can seal against the side valve body 403 under the action of the spring 404. The guide rod 4021 slides against the side valve body 403 and the flow path 406. The locking pin 405 slides against a locking pin guide hole 4024 on the guide rod 4021. The main valve disc 407 has a groove 4071 that engages with the locking pin 405. The locking pin 405 limits or releases the groove 4071 of the main valve disc 407 during the axial reciprocating motion of the guide rod. The main valve disc 407 is rotatably connected to the flow path 406 via the pin 408, so that it opens or closes in conjunction with the side valve disc 402 under water supply pressure, realizing water path switching during pump starting.

[0059] The pump starting device provided by this invention solves the problems of long start-up time, reliance on vacuum devices or foot valves, complex structure, high energy consumption, and cavitation in traditional liquid-supported centrifugal pumps through the linkage structure of the side valve and the main valve. It achieves automatic water circuit switching under the pressure of the feed pump, enabling the main pump to meet start-up conditions quickly and smoothly transition to normal operation. Its advantages include: rapid start-up without a vacuum pump, simplified structure, and reduced failure rate; the limiting / releasing cooperation of the locking pin and slot ensures the reliability of valve switching, achieving automated and unattended operation; the main valve fully opens after the main pump is running stably, reducing suction resistance, preventing cavitation, and improving pump efficiency and safety; and the dual action of spring reset and hydraulic drive enhances operational stability and safety.

[0060] In one embodiment, the side valve disc 402 includes a valve disc 4023 fixedly connected to the guide rod 4021. The valve disc 4023 is provided with a side valve disc annular sealing surface 4022. By setting the valve disc and the annular sealing surface, it is ensured that the valve can reliably fit with the side valve body when the valve is closed, forming an effective seal, preventing backflow of air or water, and ensuring that the main pump can quickly expel air and maintain the sealing of the water suction channel before it is started, thereby creating conditions for the rapid start-up of the main pump.

[0061] The spring 404 is connected to the side valve flap 402 and is used to make the annular sealing surface 4022 of the side valve flap fit and seal with the annular sealing surface 4033 of the side valve body in the pressure-loss or closed state; the spring can automatically push the valve flap back to the sealing position in the system pressure-loss or shutdown state, realizing the self-resetting function, ensuring that the device remains sealed in the non-operating state, avoiding water body backflow or air entry, and enhancing the safety and reliability of the system operation.

[0062] Both ends of the fluid passage 406 are of flange structures connected to the suction pipe of the centrifugal pump, and a bottom annular sealing surface 4066 cooperating with the main valve flap 407 is arranged at the inner bottom. An inlet 4063 communicating with the side valve body and an inlet flange 4064 are arranged on one side close to the side valve body, and a fluid passage positioning hole 4062 at the same horizontal plane as the positioning hole 4031 of the side valve body is provided. The flange connection facilitates reliable assembly with the main pump suction pipe and is convenient for installation and maintenance; the bottom annular sealing surface provides a reliable mating interface for the sealing of the main valve flap, improving the sealing effect; the arrangement of the inlet and the inlet flange ensures smooth communication with the side valve body, with a clear water flow path and reduced hydraulic loss; the positioning holes cooperate with the guide rods to ensure the stability and centering of the valve action, avoid jamming, and improve the structural reliability.

[0063] The main valve flap 407 is provided with a main valve flap sealing surface 4073 cooperating with the bottom annular sealing surface 4066 and a main valve flap pin hole 4074 for rotational installation. The main valve flap sealing surface fits with the bottom sealing surface of the fluid passage, which can effectively block or conduct the water flow, ensuring accurate and reliable water path switching in the starting stage and the operating stage; the pin hole structure facilitates rotational cooperation with the pin shaft, realizes flexible opening and closing of the valve, reduces the frictional resistance, makes the valve action stable, and extends the service life.

[0064] The pin shaft 408 is inserted into the fluid passage pin hole 4061 and the main valve flap pin hole 4074, so that the main valve flap 407 can be opened and closed relative to the fluid passage 406; the pin shaft serves as the rotation fulcrum of the main valve flap, ensuring that the valve can be opened and closed around a fixed axis, with a simple structure, reasonable force, convenient for processing and assembly, and at the same time ensuring the reliability and durability of the valve action.

[0065] One end of the guide rod 4021 is in sliding fit with the positioning hole 4031 of the side valve body, and the other end is in sliding fit with the positioning hole 4062 of the fluid passage, so as to drive the side valve flap 402 to open under the action of the water supply pressure of the feed water pump and cooperate with the snap pin 405 to realize the linkage control of the main valve flap 407. The double-end sliding fit forms a stable linear guide, ensuring the accuracy of the guide rod in the axial movement, avoiding jamming of the valve due to eccentric force; under the action of the water supply pressure of the feed water pump, the guide rod drives the side valve flap to open and linkage-controls the main valve flap, realizing automatic water path switching, improving the automation degree and starting efficiency of the system; simplifying the control logic, reducing the external electric control dependence, reducing the failure rate, and improving the stability of the overall device.

[0066] In one embodiment, the pump starting device includes a guide key 401, disposed within the side valve body 403, for cooperating with the side valve disc 402 or the guide rod 4021 to limit the posture and stroke of the side valve disc and prevent swaying. The guide key, as a built-in positioning and guiding component, is directly installed inside the side valve body without adding external parts, ensuring a compact overall device, convenient installation, avoiding extra space occupation, and improving the integration and reliability of the device. By cooperating with the side valve disc or the guide rod, the guide key can provide precise guidance during the opening and closing of the valve disc, preventing the valve disc or guide rod from deviating, keeping the valve movement stable, thereby improving the alignment and sealing effect of the sealing surface.

[0067] In one embodiment, the side valve body 403 is horizontally installed, and the side valve body positioning hole 4031 is fixed to the body of the side valve body 403 by connecting stiffeners. The horizontal installation of the side valve body ensures greater stability in the force and movement direction of the internal components, which is beneficial for the balance and sealing effect during valve opening and closing. Simultaneously, the fixing of the positioning hole to the side valve body by connecting stiffeners enhances the overall structural strength and rigidity, preventing hole displacement or loosening due to vibration or water flow impact, thereby improving the reliability and service life of the device.

[0068] In one embodiment, the side valve body positioning hole 4031 and the fluid passage positioning hole 4062 are located on the same horizontal plane and are coaxial with each other, forming a sliding fit structure with the guide rod 4021 with double guide holes, thus constraining the axial linear movement of the guide rod 4021. The design of the side valve body positioning hole and the fluid passage positioning hole being on the same horizontal plane and coaxial with each other, forming a sliding fit with the guide rod with double guide holes, effectively constrains the movement trajectory of the guide rod, ensuring precise axial linear movement and preventing tilting, jamming, or misalignment of the valve disc sealing surface caused by uneven force or offset. This improves the stability and sealing reliability of the valve opening and closing, reduces wear, extends the service life of the device, and enhances the overall operational safety and reliability.

[0069] In one embodiment, the annular sealing surface 4033 of the side valve body and the annular sealing surface 4022 of the side valve disc have a surface contact or line-to-surface contact structure, and form a self-resetting seal under the preload of the spring 404. By designing the annular sealing surface of the side valve body and the annular sealing surface of the side valve disc as a surface contact or line-to-surface contact structure, a stable sealing interface can be formed when the valve is in contact under force. Combined with the preload of the spring, the valve can reliably seal when closed and automatically reset and close when the pressure is released, thus achieving a self-resetting sealing function. This not only ensures the reliability of the seal and the flexibility of water circuit switching, but also reduces the risk of leakage, improves the safety and stability of the device operation, reduces maintenance frequency, and extends service life.

[0070] In one embodiment, the bottom annular sealing surface 4066 inside the fluid passage 406 is arranged facing the main valve disc sealing surface 4073, and the main valve disc 4073 is opened or closed by rotating around a horizontal axis via the pin 408. The facing arrangement of the bottom annular sealing surface of the fluid passage and the main valve disc sealing surface ensures reliable contact when closed, guaranteeing a tight seal in the water circuit and preventing leakage or air ingress. Simultaneously, the main valve disc forms a horizontal rotational connection with the fluid passage via the pin, allowing for smooth opening or closing around a fixed axis, achieving controllability and stability of valve operation. This structure not only simplifies the opening and closing process and reduces friction and wear, but also ensures a smooth and efficient water circuit switching process, thereby improving the reliability and service life of the entire starting device.

[0071] In one embodiment, the water pump starting device includes: a fluid inlet 4063 and an inlet flange 4064 are provided on the side near the side valve body 403 for connection and communication with the second flange 4035 of the side valve body 403; the first flange 4032 of the side valve body 403 is used for detachable connection with the outlet flange of the feed pump. The fluid inlet and inlet flange on the side near the side valve body, and their connection with the side valve body via flanges, ensure the sealing and stability of the water flow channel, while facilitating assembly and disassembly, and simplifying daily maintenance and repair. The detachable connection between the first flange of the side valve body and the outlet flange of the feed pump allows for flexible installation and replacement of the water pump starting device, improving the modularity and adaptability of the system, reducing maintenance costs, and enhancing the overall reliability and convenience of operation.

[0072] In one embodiment, the fluid passage 406 is provided with a horizontally oriented fluid passage pin hole 4061, and the pin shaft 408 passes through the fluid passage pin hole 4061 and the main valve disc pin hole 4074, allowing the main valve disc 407 to swing and switch between an open and closed state. The fluid passage is provided with a horizontally oriented pin hole, and the pin shaft engages with the pin hole of the main valve disc, enabling the main valve disc to swing and switch between open and closed states with the pin shaft as a fulcrum. This structural design is simple and has reasonable force distribution, ensuring the stability and controllability of the main valve disc rotation, preventing misalignment or jamming of the valve during switching; it also achieves rapid switching and reliable sealing of the water circuit, improving the operating efficiency and reliability of the device, and helping to extend the service life of the valve and its mating components.

[0073] like Figure 7As shown, a fast-start water pump includes: a submersible feed pump 2, a pump starting device 4, an upper suction pipe 3, a lower suction pipe 6, a centrifugal pump 5, and a filter screen 7. The outlet of the submersible feed pump 2 is connected to the first flange 4032 of the inlet of the pump starting device 4. The third flange 4065 of the outlet of the pump starting device 4 is connected to the upper suction pipe 3, and the fourth flange 4067 is connected to the lower suction pipe 6. The upper suction pipe 3 is connected to the inlet of the centrifugal pump 5. The submersible feed pump 2 and the centrifugal pump 5 are connected by the starting device 4 to achieve unidirectional water flow. The starting device 4 has an automatic switching function; the submersible feed pump 2 shuts off after the centrifugal pump 5 starts, and the centrifugal pump 5 maintains continuous operation by its own hydraulic power. The spring 404 of the starting device 4 is used to push the side valve and main valve to reset after the submersible feed pump 2 is shut off, thereby eliminating suction resistance.

[0074] In one embodiment, the submersible water pump includes a submersible impeller, a motor mounted on the ground, and a pump shaft and an outer pipe connecting the impeller and the motor; a filter screen 7 is provided on the lower suction pipe 6 to filter impurities entering the pump body.

[0075] In view of the problems with the starting method of the liquid-supported centrifugal pump, we have invented a fast-start water pump, which is installed on the lower suction pipe 6 of the centrifugal pump 5 and located below the water surface. When the centrifugal pump 5 needs to be started, the submerged water feed pump 2 is started first. When the centrifugal pump 5 meets the starting conditions, it starts. After the centrifugal pump 5 starts, the submerged water feed pump 2 is shut off, and the centrifugal pump 5 can achieve instantaneous and reliable start-up.

[0076] The quick-start water pump consists of a submersible feed pump 2 (hereinafter referred to as the feed pump) and a water pump starting device 4. One end of the water pump starting device 4 is connected to the outlet of the feed pump 2, and the other end is connected to the upper suction pipe 3 of the centrifugal pump 5.

[0077] 1. The submersible water pump 2 has the following structural features: a submerged impeller, a motor above ground, several inner and outer pipes, a pump shaft, a rubber bearing bracket, and a guide bearing, etc.

[0078] 2. The water pump starting device 4 consists of a guide key 401, a side valve disc 402, a side valve body 403, a spring 404, a locking pin 405, a flow channel 406, a main valve disc 407, and a pin 408. The main valve disc 407 can be referred to as the main valve, and the side valve disc 402 can be referred to as the side valve.

[0079] Specifically, the side valve body 403 contains a guide key 401, a side valve disc 402, a spring 404, and a retaining pin 405. The side valve body 4034 is installed horizontally. The first flange 4032 of the side valve body is connected to the outlet flange of the water pump, and the second flange 4035 of the side valve body is connected to the inlet flange 4064 of the fluid. The side valve body 4034 has a side valve body positioning hole 4031 for mounting a guide rod near the water pump. The side valve body positioning hole 4031 is fixed to the side valve body 4034 by a connecting rib. The side valve body 4034 has an annular sealing surface 4033 near the water pump.

[0080] The valve disc 4023 in the side valve disc 402 is fixed together with the guide rod 4021. The valve disc 4023 has a side valve disc annular sealing surface 4022 on the side near the water pump. This sealing surface and the annular sealing surface 4033 on the side valve body achieve mutual sealing under the action of the spring.

[0081] The guide rod 4021 in the side valve disc 402 has one end slidingly engaged with the side valve body positioning hole 4031 and the other end slidingly engaged with the fluid positioning hole 4062. The guide rod 4021 has a locking guide hole 4024 on the fluid side, which is slidably engaged with the locking pin 405.

[0082] In one embodiment, the fluid passage 406 contains a main valve disc 407, a pin 408, etc. Both ends of the fluid passage 406 are flanges connected to the suction pipe 3 of the centrifugal pump 5. Flanges are located at both the top and bottom of the fluid passage. Inside the bottom, there is a bottom annular sealing surface 4066. Above the annular sealing surface, near the feed pump, there is an inlet 4063 and a flange 4064 connected to the side valve body. The inner diameter of the inlet has a guide rod positioning hole 4062, which is on the same horizontal plane as the side valve body positioning hole 4031. The positioning hole is fixed to the fluid passage 406 by a connecting rib. Near the side fluid 403, above the bottom annular sealing surface 4066 and below the water passage, there is a horizontal fluid passage pin hole 4061. A matching pin 408 is located inside the fluid passage pin hole 4061, through which the main valve disc 407 is installed inside the fluid passage 406.

[0083] The main valve disc 407 has a main valve disc sealing surface 4073 that mates with the bottom sealing surface 4066 of the fluid ring. The bottom of the main valve disc 407 is provided with a main valve disc pin hole 4074. The main valve disc pin hole 4074 and the fluid pin hole 4061 are connected together by a pin 408, and the main valve disc 407 can be opened and closed.

[0084] The present invention also provides a method for starting a water pump quickly, applicable to water pumps equipped with a water pump starting device, comprising:

[0085] Step S11: Start the submersible water pump 2 to supply water to the upper suction pipe 3 of the centrifugal pump 5 and purge the air;

[0086] Step S12: During the water supply process of the submersible water pump 2, the side valve 402 is pushed to open, and the main valve 407 and the bottom annular sealing surface 4066 of the fluid 406 are sealed to allow water to enter the centrifugal pump 5.

[0087] Step S13: After the centrifugal pump 5 meets the start-up conditions, start the centrifugal pump 5;

[0088] Step S14: After the centrifugal pump is running stably, the main valve disc 407 opens automatically, and the retaining pin 405 enters the main valve disc retaining groove 4071.

[0089] Step S15: Turn off the submersible water pump 2, and the side valve 402 resets under the action of the spring 404;

[0090] Step S16: The main valve disc 407 is fully opened relative to the upper suction pipe 3, and the centrifugal pump enters normal operation.

[0091] Specifically, when centrifugal pump 5 starts, submersible feed pump 2 starts first. The water pressure from submersible feed pump 2 opens side valve 402, guide rod 4021 slides forward, pushing the disengaged valve to rotate around pin 408. Main valve 407 rotates to a certain angle, and locking pin 405 disengages from the locking groove 4071 of main valve 407. Main valve 407 forms a seal with bottom annular sealing surface 4066 of fluid 406, ensuring that water from the quick-start pump can only enter the centrifugal pump 5. Inside; after the centrifugal pump 5 meets the starting conditions, it starts. When the centrifugal pump 5 reaches a stable operating state, the water flow opens the main valve disc 407 by a certain angle. At this time, the locking pin 405 falls into the locking groove 4071 of the main valve disc 407, and the submersible feed pump 2 is closed. Under the action of the spring 404, the side valve disc 402 and its corresponding guide rod 4021 slide backward to close the annular sealing surface 4022 of the side valve disc 402 with the annular sealing surface 4033 of the side valve body 403. The guide rod 4021 drives the main valve disc 407 to fully open, eliminating the resistance of the main valve disc 407 to the centrifugal pump's water intake. At this point, one start-up cycle is completed.

[0092] The rapid-start water pump starting method provided by this invention utilizes a submersible feed pump to supply water before starting the centrifugal pump. This rapidly fills the suction pipe and pump body with liquid and removes air, avoiding the problems of long starting times, complex structures, and cavitation issues associated with traditional vacuuming or priming methods. The feed pump's water pressure drives the side valve to open and simultaneously seals the main valve, ensuring a single water supply path and stable flow, thus guaranteeing optimal starting conditions for the centrifugal pump. After the centrifugal pump is running stably, the main valve automatically opens and locks under the combined action of water flow and a locking pin, fully opening the channel, reducing suction resistance, and improving pump efficiency. Simultaneously, the side valve closes under spring action, preventing backflow to the feed pump and achieving automatic switching and safety isolation. The entire process requires no vacuum device or manual operation, enabling rapid, reliable, and automated starting, significantly improving the safety, stability, and intelligence of the system, and extending the equipment's service life.

[0093] The description of this invention is given for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A water pump starting device, characterized in that, include: Side valve body (403), side valve disc (402), guide rod (4021), spring (404), locking pin (405), fluid flow (406), main valve disc (407) and pin (408); The side valve disc (402) is connected to the guide rod (4021) and can be sealed with the side valve body (403) under the action of the spring (404); The guide rod (4021) is slidably engaged with the side valve body (403) and the fluid (406), and the locking pin (405) is slidably engaged with the locking pin guide hole (4024) provided on the guide rod (4021). The main valve disc (407) is provided with a locking groove (4071) that engages with the locking pin (405). When the guide rod reciprocates axially, the locking pin (405) limits or releases the locking groove (4071) of the main valve disc (407). The main valve disc (407) is rotatably connected to the fluid flow (406) via a pin (408) so that it can be opened or closed in conjunction with the side valve disc (402) under the action of water supply pressure, thereby realizing the water circuit switching during the pump start-up process.

2. The water pump starting device according to claim 1, characterized in that, Also includes: The side valve body (403) is placed horizontally and has a straight inner cavity. The diameter of the inner cavity on the left side of the side valve body (403) is smaller than the diameter of the inner cavity on the right side. The side valve disc (402) includes a valve disc (4023) fixedly connected to the guide rod (4021). The diameter of the valve disc (4023) matches the diameter of the inner cavity on the left side of the side valve body (403). The valve disc (4023) is provided with a side valve disc annular sealing surface (4022) that matches the side valve body annular sealing surface (4033). The side valve body annular sealing surface (4033) and the side valve disc annular sealing surface (4022) are in surface contact or line-surface contact structure, forming a self-resetting seal under the preload of the spring (404). The spring (404) is connected to the side valve disc (402) to make the annular sealing surface (4022) of the side valve disc fit and seal with the annular sealing surface (4033) of the side valve body in the depressurized or closed state; when there is inlet water pressure, the side valve disc (402) is pushed to the right to release the main valve disc (407).

3. The water pump starting device according to claim 1, characterized in that, Also includes: The fluid flow (406) is configured to be installed vertically so that the main valve disc (407) can fall and close by gravity; The two ends are flange structures that connect to the suction pipe of the centrifugal pump, and a bottom annular sealing surface (4066) that cooperates with the main valve disc (407) is provided at the bottom inside. An inlet (4063) and an inlet flange (4064) that communicate with the side valve body are provided on the side near the side valve body. The side valve body positioning hole (4031) and the fluid positioning hole (4062) are located on the same horizontal plane and are coaxial with each other, and form a sliding fit structure with the guide rod (4021) with double guide holes, which is used to constrain the axial linear movement of the guide rod (4021); and / or The main valve disc (407) is provided with a main valve disc sealing surface (4073) that mates with the bottom annular sealing surface (4066) and a main valve disc pin hole (4074) for rotatable installation; and / or A pin (408) passes through the fluid flow pin hole (4061) and the main valve disc pin hole (4074) so ​​that the main valve disc (407) can be opened and closed relative to the fluid flow (406); and / or One end of the guide rod (4021) is slidably engaged with the side valve body positioning hole (4031), and the other end is slidably engaged with the fluid positioning hole (4062) so that the side valve disc (402) is opened under the water supply pressure of the water pump and the locking pin (405) is used to realize the linkage control of the main valve disc (407).

4. The water pump starting device according to claim 3, characterized in that, include: A guide key (401) is mounted on a guide rod (4021) to cooperate with the side valve disc (402) or the guide rod (4021) to limit the attitude and stroke of the side valve disc and prevent swaying. and / or The side valve body (403) is installed horizontally, and the side valve body positioning hole (4031) is fixed to the side valve body body (4034) of the side valve body (403) through the connecting stiffener.

5. The water pump starting device according to claim 2 or 3, characterized in that, The bottom annular sealing surface (4066) inside the fluid (406) is arranged facing the main valve disc sealing surface (4073), and the main valve disc (407) is opened or closed by rotating around the horizontal axis through the pin (408).

6. The starting device according to claim 2 or 3, characterized in that, include: The fluid (406) is provided with an inlet (4063) and an inlet flange (4064) on the side near the side valve body (403) for connection and communication with the second flange (4035) of the side valve body (403); and / or The side valve body (403) and the first flange (4032) are used for detachable connection with the outlet flange of the water pump.

7. The water pump starting device according to claim 2 or 3, characterized in that, The fluid passage (406) is provided with a horizontal fluid passage pin hole (4061), and the pin (408) passes through the fluid passage pin hole (4061) and the main valve disc pin hole (4074), so that the main valve disc (407) swings and switches between the open state and the closed state.

8. A water pump that starts quickly, characterized in that, include: Submersible water pump (2), water pump starting device (4) as described in any one of claims 1-7, upper suction pipe (3), lower suction pipe (6), centrifugal pump (5), filter screen (7); The outlet of the submersible water pump (2) is connected to the first flange (4032) of the inlet of the water pump starting device (4), the third flange (4065) of the outlet of the water pump starting device (4) is connected to the upper suction pipe (3), the fourth flange (4067) is connected to the lower suction pipe (6), and the upper suction pipe (3) is connected to the inlet of the centrifugal pump (5).

9. The fast-start water pump according to claim 8, characterized in that, include: The submersible water pump includes a submersible impeller, a motor mounted on the ground, and a pump shaft and an outer pipe connecting the impeller and the motor. and / or A filter screen (7) is installed on the lower suction pipe (6) to filter impurities entering the pump body.

10. A method for quickly starting a water pump, characterized in that, A quick-start water pump suitable for installation with the water pump starting device according to any one of claims 1-7, comprising: Start the submersible water pump (2) to supply water to the water pump starting device (4). The side valve (402) of the water pump starting device (4) moves to the right to open and lowers the main valve (407) to close it. The centrifugal pump (5) and the upper suction pipe (3) are supplied with water and the air is purged. Once the centrifugal pump (5) is ready to start, start the centrifugal pump (5); After the centrifugal pump (5) is running stably, the main valve disc (407) opens automatically, and the retaining pin (405) enters the main valve disc retaining groove (4071); When the submersible water pump (2) is turned off, the side valve (402) closes under the action of the spring (404); The main valve disc (407) is fully open, and the centrifugal pump (5) enters normal operation.

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